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Burton Theodore A.; Purnaras Ioannis K.: Necessary and sufficient conditions for large contractions in fixed point theory. (2019)
Burton Theodore A.; Purnaras Ioannis K.: Positive kernels, fixed points, and integral equations. (2018)
Burton Theodore Allen; Purnaras Ioannis K.: Positive kernels, fixed points, and integral equations. (2018)
Burton Theodore Allen; Purnaras Ioannis K.: Global existence and uniqueness of solutions of integral equations with delay : progressive contractions. (2017)
Becker Leigh C.; Burton Theodore Allen; Purnaras Ioannis K.: Complementary equations: a fractional differential equation and a Volterra integral equation. (2015)
Purnaras Ioannis K.: On the existence of solutions to some nonlinear integrodifferential equations with delay. (2007)
Purnaras Ioannis K.: A note on the existence of solutions to some nonlinear functional integral equations. (2006)